Stability of the electroweak vacuum with respect to vacuum tunneling to the Komatsu vacuum in the cMSSM

Abstract

We investigate the stability of the electroweak vacuum with respect to vacuum tunneling to the Komatsu vacuum, which exists when $m_L^2+m_{H_u}^2<0$, in the cMSSM. Employing the numerical tools SARAH, SPheno and CosmoTransitions, we scan and constrain the parameter space of the cMSSM up to 10 TeV. Regions excluded due to having a vacuum tunneling half-life less than the age of the observable universe are concentrated near the regions where the electroweak vacuum is tachyonic and are more stringent at smaller $m_0$, larger and negative $A_0$, and larger $\tan \beta$. New excluded regions, which satisfy $m_h\simeq 125\text{GeV}$, are found.

16 pages, 5 figures